Coherent heterodyne time-domain spectrometry covering the entire "terahertz gap"

被引：296

作者：

Karpowicz, Nicholas ^{[1
]}

Dai, Jianming ^{[1
]}

Lu, Xiaofei ^{[1
]}

Chen, Yunqing ^{[1
]}

Yamaguchi, Masashi ^{[1
]}

Zhao, Hongwei ^{[1
]}

Zhang, X. -C. ^{[1
]}

Zhang, Liangliang ^{[2
]}

Zhang, Cunlin ^{[2
]}

Price-Gallagher, Matthew ^{[3
]}

Fletcher, Clark ^{[3
]}

Mamer, Orval ^{[4
]}

Lesimple, Alain ^{[4
]}

Johnson, Keith ^{[5
]}

机构：

[1] Rensselaer Polytech Inst, Ctr Terahertz Res, Troy, NY 12180 USA

[2] Capital Normal Univ, Dept Phys, Beijing 100037, Peoples R China

[3] HydroElectron Ventures Inc, Westmount, PQ H3A 2A, Canada

[4] McGill Univ, Mass Spec Unit, Montreal, PQ H3A 1A4, Canada

[5] MIT, Cambridge, MA 02238 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2828709

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Terahertz waves, electromagnetic radiation in the spectral region commonly defined between 0.3 and 10 THz, allow innovative sensing and imaging techniques that can provide spectroscopic information unavailable at other wavelengths. However, simultaneously intense, broadband, and coherent spectroscopic measurement remains challenging. We report spectrometry using gases ionized by femtosecond pulses to generate and sense broadband terahertz pulses. Using a coherent heterodyne technique, the measurements span the "terahertz gap" with >= 10% of the maximum signal from 0.3 to 10 THz. This spectrometer, using a recycled optical probe beam and coherent detection, offers a high field strength and time-resolved measurement.

引用

页数：3

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